/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Classes/AchievementWriteCallbackProxy.h
Writes progress about an achievement to the default online subsystem AchievementName is the ID of the achievement to update progress on Progress is the reported progress toward accomplishing the achievement UserTag is not used internally, but it is returned on success or failure
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Meta=(BlueprintInternalUseOnly="true", WorldContext="WorldContextObject"), Category="Online|Achievements") static [UAchievementWriteCallbackProxy](API\Plugins\OnlineSubsystemUtils\UAchievementWriteCallbackProxy) * WriteAchievementProgress ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, [APlayerController](API\Runtime\Engine\GameFramework\APlayerController) * PlayerController, [FName](API\Runtime\Core\UObject\FName) AchievementName, float Progress, int32 UserTag )